
Start a scan process and see the overall situation. Among the best are WizTree, DiskSavvy, and TreeSize. There are many alternative disk space analyzers for Windows. Which are other good Space Sniffer alternatives?

Space Sniffer is Windows only, but an alternative for macOS called GrandPerspective works similarly. The author accepts donations for further development. Space Sniffer is great for identifying big apps or files you can delete to recover space on your storage drive. Space Sniffer scans your storage drives in real time and lets you visualize how your files and folders are structured and which files are taking the most space.

Ben Shneiderman, who kindly permitted the use of his concept into this tool. By using a Treemap visualization layout, you have immediate perception of where big folders and files are placed on your devices.

SpaceSniffer is a freeware (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks.
